1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
schepotkina [342]
2 years ago
9

The current in a stream moves at a rate of 7 mph. If a boat travels 98 miles downstream in the same time that it takes to travel

49 miles upstream, what is the speed of the boat in still water?​
Mathematics
2 answers:
JulijaS [17]2 years ago
6 0

If the current in a stream moves at a rate of 7 mph. If a boat travels 98 miles downstream in the same time that it takes to travel 49 miles upstream then the speed of the boat in still water is 21 miles per hour.

<h3>What is speed?</h3>

Speed is the distance covered by an object in a certain time period. It is also known as velocity. The formula of speed is as follows:

Speed=Distance/ Time.

<h3>How to calculate speed?</h3>

We have been given that the speed of stream is 7miles per hour.

Let v be the speed of the boat, and t the time to travel

98=t*(7+v) (1)

49=t(v-7) (2)

(1)+(2) => 2tv=147

7t+(49+7t)=98

14t+49=98

14t=49

t=49/14

t=7/2

Put the value of t in equation 1 to get the value of v:

98=t(7+v)

98=7/2(7+v)

196/7=7+v

28=7+v

v=28-7

v=21

Hence if the current in a stream moves at a rate of 7 mph. If a boat travels 98 miles downstream in the same time that it takes to travel 49 miles upstream then the speed of the boat in still water is 21 miles per hour.

Learn more about speed at brainly.com/question/4931057

#SPJ2

Karo-lina-s [1.5K]2 years ago
5 0

The answer is x=21 the explanation is on the picture above I hope I helped

You might be interested in
Can someone please help me I'm confused as to what I'm supposed to do.
kobusy [5.1K]
I hope this helps you


(fog)(5)=f (g (5))=?



x= 5 g (5)=-4.5+3=-20+3=-17




f (g(5))=f (-17)=-2. (-17)-7




f (-17)=34-7




f (-17)=27
4 0
3 years ago
Help ASAP if u can ?
scoundrel [369]

Answer:

7 and -8

Step-by-step explanation:

A coefficient is a numerical or constant quantity placed before and multiplying the variable in an algebraic expression (e.g. 4 in 4x).

8 0
3 years ago
I need help and please how work
Leviafan [203]

Answer:


Step-by-step explanation:


4 0
3 years ago
Yo help<br><br> NO LINKS PLS
s344n2d4d5 [400]

Answer:

19 square millimeter

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Find the slope of the lines graphed below.
kolbaska11 [484]
The answer is 4/8 or 0.5(simplified)
7 0
3 years ago
Other questions:
  • Answer correctly for brainliest and also get a thanks ! Don't answer if you don't know it please :)
    10·2 answers
  • Which of the following lines is parallel to the graph of 5x+2y=8
    6·1 answer
  • If you invest $9,200 per period for the following number of periods, how much would you have in each of the following instances?
    14·1 answer
  • I need help please with this homework asap thank you
    7·1 answer
  • Circle D circumscribes ABC and ABE. Which statements about the triangles are true?
    9·2 answers
  • I don't know how to answer this. ??
    6·2 answers
  • Natalie consumes only apples and tomatoes. Her utility function is U(x, y) = x 2y 8 , where x is the number of apples consumed a
    10·1 answer
  • A company that offers tubing trips down a river rents tubes for a person to use for $20 and “cooler” tubes to carry food and wat
    10·1 answer
  • What is the equation of the line that passes through the point (-7, 2) and has a slope of -1?​
    9·1 answer
  • Help me pls 27 pnts(:(:
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!